She's said in basically every interview that she loves Joe and is with him because he loves her for who she is and she can be herself around him and he won't judge that. That doesn't really sound like someone abusive and that treats her like tit, does it? While, yes, he's said some things in the past that were a bit douchey and I don't agree with, it's also so obvious that he adores her and would never want to hurt her or upset her. And he's also not said anything like it recently. Other than the very few offhanded comments in videos from a couple of years ago there is literally no evidence that he's anything but loving and supportive of her.
I honestly don't know where you've got this narrative from that Dianne is some poor girl suck with a horrible, abusive, and controlling man but I feel like nothing will change your mind on it, despite being proved wrong about many things by other users.
There's lots of things to trash on Joe about, but him being a supposedly abusive prick isn't one of them.